Shannon Stewart for Fuse

Midway through Tegan and Sara's unbelievably killer set at SXSW (hey, identical twins know how to put on a cohesive show), fans learned a startling truth about the indie pop duo: They're terrified of potential GIFs.

After a fan threw an inflatable beach ball on the stage to no avail, the indie pop duo explained their GIF phobia to the crowd at SXSW. "Basically, my worst nightmare is getting hit in the face over and over in a GIF," Sara told the crowd.

So take notice: Leave Tegan and Sara alone with the GIFs churning about in your mind. Because they're too nice for all that jazz.